Floor scrubbing machine



Jan. 5, 1932.

A. H ZUCKER FLOOR SCRUBBING MACHINE Filed May 25, 1929 4 Sheets-Sheet Jan. 5?, 1932, A. H. ZUCKER FLOOR SCRUBBING MACHINE Filed May 25, 1929 4 Sheets-Sheet 2 ATTORNEY.

Jan. 5, 1932. ZUcKE-R 1,839,824

FLOOR S CRUBBING MACHINE Filed May 25, 1929 4 Sheets-Sheet s a MZM 25 A TTORNEY.

A H. ZUCKER Jan. 5, 1932 FLOOR SCRUBBING MACHINE Filed May 25, 1929 4 Sheets-Sheet 4 I N VEN TOR A TTORNE Y.

Patented Jan. 5, 1932 ABRAHAM Ii. zucnnrt,

OF CLEVELAND, 01110 I FLOOR scniiBBiNG MACHINE.

Application filed May 25,

The invention relates to improvements in motor operated floor scrubbing or polishingmachines of the type'inwhich the weightof the machine is removed from the brushes: and

.7m this instance the; brushes are supported upon springs that are attached to frames which are slidably mounted in guides in the machine The particular objects-are'to provide an automatically acting machine in which opposedsets of scrubbing brushes are employed that engage with the floor at oppo-- site sides of the machine and operate transversely'ofthe machine in opposite directions, thus alternately approaching and receding fromleach other. 7 By this method of construction the strains upon the frame work of the machine are balanced and all vibration of the machine while at workis eliminated.

l he'invention includes also means for discharging water or cleaning fluid and cleaning powder finely distributed sheets over the floor. in advanceof the brushes.

It-includes also the provision of upper and 5; lower reciprocating :frames, brushes attached to'th'e'lower frames and resilient means for supporting the lower frames upon the upper frames, the-resilient connecting meansserv ingalso as a positive propelling means for-the -Tlower frames and brushes thereon. H

To accomplish these and other useful results, the invention comprises the combination and arrangementof parts and construc tion of the various details, hereinafter de- 5 scribed, illustrated in the accompanying drawings and specifically pointed out in the claims. p

In the accompanying drawings, F ig.";1- is a horizontal section of the machine on a 'horiio zontal plane beneath the upper wall of the casing Fig. 2. Fig. 2 is a vertical longitudinal section of the machine on center line Fig.

1. Fig. 3 is a vertical longitudinal section on central plane of the machine Fig. 1. Fig. 4-isan end elevation of the upper andlower frames and attached brushes. Fig. 5 is a.

plan thereof. -Fig. 6 is a vertical-section of, the lower end of the powder. container. Fig.

7 is a side elevation thereof. Fig. 8 is aperspective ofthe brush holding springs. I

1929, Serial Nb. 365,994.

Inthese views 1 is the hollow external casing 'ofthe machine, which is open below and-provided with the marginal horizontal; top member Upon a narrowed portion of the top'member is mounted the electricmotor 3 andlongitudinal motor shaft 4 uponthe vouter end of which issecured the pinion 5. I

The pinioniprovides the driving-power for thesdivided crank shaft 6by=means of the large-speed reducing gear-7. The extremities of 'thesha-ftare; mounted in ball bearings 8,8

Upon the crankspins9, 9 connecting rods R are 'mounted in ballbearings 10, 10their;.

' opposite ends being pivoted at ll, 11, in separate horizontal upperfralnes 12, 12,.positioned at oppositesides'ofthemachine.

.These frames reciprocate in" V; shapedv grooves 13, .13. in transverse guides 14, 14; 7

which are adj ustablysecured to the top mem-. her 2 by meansiof bolts 15, 15 respectively.

--These: upper fra-mes reciprocate -in their cranks and-crank pins are arranged upon opposite sides .of the shaft to produce this ac'-. tion... c

Beneath the upper frames'12, 12- are shown the lowerxhorizontal frames16 to which the scrubbingbrushes :17, 17 are attached;

The respective upper and lower frames areresiliently secured together by means of op, positely inclined'ba-nd springs 18 and 19re+ spectively, by \means of which the low'er framesare upheld and arepropelled in both directions. a r I 1 T he springs 18 arebolted atY to the upper ATENTF H OFFICE 1 guides towards and from each .otheriand-theii I frames andare pivoted at 20 inthelow'enframes'respectively, and the reversely in-Q V clinedsprings19 are bolted at X to the-ups per frames and are pivotedin shackle links- 23 at-their lower ends upon the lower. frames, 7 thus enablingthemto res pressure upon them.

pond readily. to the The lower frames 16 are-providedwith; parallel; downwardly turned longitudinalfiangesfl, 24 which are inclined inwardlyto 1 provide dovetailed sockets in which i the" longitudinally grooved upper T edges 25, i 25 of the brush backs are. inserted and also spring H, inserted 1 underneath the I brush backs, extend over the ends of the brush backs 17 and are secured in openings in the top of the lower frame to prevent end movement of the brushes. See Fig. 7.

In this manner the brushes are made to reciprocate within the sides of the outer frame or casing, and cannot escapetherefrom. Front rubber tired wheels 27 are mounted upon the shafts 28 secured in brackets29 upon the inner sides of the outer casing and rear rubber tired wheels 30 are mounted upon a shaft 82 and appear externally. of the rear portion 31 of. the frame which is somewhat reduced in width. 1 In this manner 1 the brushes are wholly relieved from the weight of the casing, which rests squarely upon the wheels 27 and 30, which are widely spaced apart as shown in Fig. 1, so there is no danger of tipping the casing.

The gearing is enclosed in an external casing 33' thus preventing them .from catching in the clothing of the operator.

A reservoir 34 for water or a cleaning fluid is mounted upon the top of the casing, and

pipes 35,35 leaddownward from this reservoir toa distributing apron 36 in front of the machine and over the front edge ofzthis apron the water or fluid is uniformly dis-' tributed over' the floor in front of the 80 ibrushes. Also acleaning powder is deposit ed in front of the brushes froma receptacle T and aperforated sifting plate T operates over a perforated bottom plate T2 to distribute the powder uniformly. ..See Figs; 3, 3516, and 7. Q'Ihis plate may be operated by means of a rigid connection T3 upon the adjacent brushes andpasses througha slot T4 in the receptacle T. i V

It will be seen by referring to Fig. 1 that 40fthe opposed'endsof the brushes at the front of the machine are cut away at C, C so as to provide projections D, D'that overlap when they approach each other, thus conserving space under the casing and also serving to cefliciently operate over all the surface passed over by the machine and to leave no portion thereof not thoroughly scrubbeda.

To insure reciprocation 0f the upper frames in opposite directions, the crank shaft 0 is centrally positioned between the upper frames and is divided, and the connecting rods are mounted upon the crank pins 9, 9 that connect the terminal cranks a0, 40 with the intermediate continuous crank arm. 41 which is of double length, thus operating the connectingrods upon both sides of the crank shaft'and in opposite directions;

vBy employing oppositely inclined band springs forgivin both resiliency to the brush supporting rames aswell as for irn-- partinga thrust thereto, a three? point :sus

pension is obtained by means of whichthej flexibility ofthe brush when passing over inequalities in the floor is much increased.v It

7 also enables the brush to tilt slightly in all;

bers secured to said top member, a pair of opposed upper frames reciprocable towards and from each other in said guides, a corresponding number of lower frames, brushes attached to said lower frames, a longitudinal shaft and a motortherefor mounted upon said casing and a crank shaft intermediate of f'said: frames and operatively connected 7 with said motor shaft, rods connecting the cranks thereon with said upper frames on both sides of said shaft, and oppositely inclined springs for connecting each upper frame with its corresponding lower frame.

2. A machine for cleaning floors, comprising, a casing open at the bottom and having a topmember, transverse guide members secured to said top member, a pair of opposed upper frames reciprocable towards and from each other in said guides, a corresponding number of lower frames, brushes attached to said lower frames, a longitudinal shaft and a motor thereforniounted upon.

said casing and a crank shaft intermediate of said frames and operatively connected with said motor shaft, rods connecting the cranks thereon with said upper frames-on both sides ofisaid shaft, and resilient means for connecting said upper and lower frames, the opposed brushesat, the front side of said machine being cut away upon their meeting ends to permit of their overlapping each other,when they approach each other.

.3,. In a floor'cleaning machine,'a casing, brushes movable therein means for moving said brushes, a reservoir for cleaning fluid superimposed upon said casing, a receptacle for powdermounted infront of said casing an apron secured to the lower side of the front. wall of said casing, and having its discharge edge horizontal and positioned in advanceof said brushes and adjacent to said floor, and delivery pipes leading from said reservoir to said apron, a delivery spout leading from said powder receptacle, and

means connected with and operated by the brushes for releasing powder therefrom.

4; In a'floor cleaning machine, a casing open at the bottom, a pair of transversely reciprocable upper frames therein, a corresponding number of lower frames, brushes attached to said lower frames and oppositely inclined-spring bands connecting each upper frame with the corresponding lower frameto operate the. same and means for operating the upper frames.

' 5;In a floor clean ng machine, a casing open at the bottom, a pair of transversely re ciprocable upper frames therein, a correspondmg number of lowerframes, brushes attached to sald lower frames and oppositely inclined springbands connecting each upper ciprocating means.

6. In a cleaning machine, in combination, a casing open at the bottom, an upper pair of frames reciprocable in said casing towards and from each other, transversely thereof, means for reciprocating said frames, a lower pair of frames, oppositely inclined band springs for resiliently connecting each upper frame with its corresponding lower frame, and brushes secured to each lower frame, said oppositely inclined band springs, serving as resilient connections between said frames, and also serving as means for propelling said brushes in opposite directions.

7. In a floor cleaner, a support, an upper and a lower pair of frames reciprocable therein, brushes secured to said lower frames, and band springs resiliently connecting each pair of lower frames with its respective upper frame, said springs being uniformly distributed upon said frames, and alternately inclined in opposite directions, the springs inclined in one direction being pivotally attached to said lower frame, and shackle links pivoted in said lower frame to which the springs that are inclined in the opposite direction are pivoted and means for reciproeating said upper frame.

8. In a floor cleaning machine, in combina-- tion, a casing, brushes reciprocable in said casing, an elevated tank for cleaning fluid upon said casing, a receptacle for cleaning powder, means for feeding said fluid upon said floor in advance of said brushes and means operated by the movements of said brushes for depositing said cleaning powder in advance of said brushes and means for reciprocating said brushes' 9. In a floor cleaning machine, in. combiation, a casing, brushes reciprocable over said floor in said casing, a receptacle for cleaning powder secured to the front of said casing, said receptacle having a perforated bottom wall, and a perforated sifting mem ber reciprocable over said perforated bottom wall, said sifting member being operatively connected with one of said brushes and means for reciprocating said brushes.

10. In a floor cleaning machine in COIllbl-l nation, a casing, an upper and lower frame reciprocable in said casing means for reciprocating said frame and longitudinally arranged spring and thrust members connecting said upper and lower frames and alternately inclined in opposite directions, one of said spring and thrust members being cen-I trally positioned, and others being arranged on the sides thereof, providing three points of attachment for said members in each frame, 11. In a floor cleaning machine, a casing, a crank shaft and cranks in said casing, parallel transverse guides upon each side of said shaft, I upper frames reciprocable in said guides, means for reciprocating said frames, and rods connecting said cranks and upper frames, lower frames transversely reciprocable insaid casing, brushes attached to said lower frames, and springs operatively'connecting said upper and lower frames respectively, to push and pull the same.

12. In a floor cleaning machine, a transversely elongated rectangular casing, an op erating shaft mounted across the'same in the longer sides thereof, opposed cranks thereon, parallel guides in the longer sides of said casing, upper frames reciprocable in said guides in opposite directions, rods operatively connecting said cranks and upper frames, means for rotating said shaft, lower frames equalling in number said upper frames, brushes attached to said lower frames and band springs connecting said upper and lower frames, said band springs being alternately inclined forwardly and rearwardly for the purpose described.

13. In a floor cleaning machine, a transversely elongated casing having parallel I sides, a shaftmounted in the longer sides of said casing, opposed cranks thereon, guide members in said longer sides of said casing, upper frames reciprocable in said guides, a

.lowerframe beneath each of said upper frames, a brush attached to each lower frame and resilient members operatively connecting said upper and lower frames to push and pull the same.

14. A floor scrubbing machine, comprising a casing, transverse guides in said casing, upper frames movable in said guides, lower brush carrying frames, and resilient members operatively connecting said upper and lower frames, and means for reciprocating said upper frames.

15. In a scrubbing machine in combination, a: frame, pairs of brushes transversely reciprocable therein, one pair being positioned in the rear of the other pair, the brushes in each pair ofb-rushes being reciprocable towards and from each other, the brushes in the rear pair of brushes being staggeredso as to overlap each other and the brushes in the front pair of brushes having their opposed ends cut away from opposite sides to permit them to overlap each other and to have theirfront longitudinal edges in alinement with each other, a common support for the front and rear brushes in each lifepair of brushes and means for reciprocating ABRAHAM H. ZUCKER. 

